How to Successfully Remove Tree Roots from Sewer Lines: A Complete Guide

Tree roots invading sewer lines can be a nightmare for homeowners. They cause slow drains, unpleasant odors, and even sinkholes in your yard. Left untreated, roots can crack pipes, leading to expensive repairs.

The good news? There are several ways to remove tree roots from sewer pipes and prevent them from coming back. In this guide, we’ll cover why roots grow in sewer lines, the warning signs of an issue, and effective solutions to remove and prevent future root intrusion.

How and Why Do Tree Roots Invade Sewer Lines

Tree roots naturally seek moisture, oxygen, and nutrients. Sewer lines provide all three, making them the perfect target for root growth. Older homes are especially at risk since they often have clay pipes, which are more prone to cracking. These small cracks allow roots to enter the pipe, where they continue to grow and expand.

Over time, roots can create blockages that prevent wastewater from flowing properly. In severe cases, they can even break the pipe entirely. If this happens, costly repairs or pipe replacements may be necessary.

Signs You Have Tree Roots in Your Sewer Line

It’s not always easy to tell if tree roots are causing a clog. Many of the symptoms resemble other plumbing issues, but there are some key warning signs to watch for:

• Slow-draining sinks, tubs, or toilets throughout the house
• Gurgling noises coming from your toilet when you flush
• Foul odors coming from drains or outside near sewer lines
• Unexplained patches of standing water or soft ground in your yard
• Trees or shrubs growing unusually fast near sewer lines

If you notice these signs, tree roots could be the culprit. The best course of action is to act fast before the problem worsens.

How to Remove Tree Roots from Sewer Pipes

Once tree roots have entered your sewer line, you need to remove them before they cause further damage. There are a few common methods for clearing roots from pipes, each with its own advantages and limitations:

Mechanical Root Removal

One of the most effective ways to remove tree roots is with mechanical equipment. This involves using a specialized cutting tool to chop up the roots and clear the blockage.

Plumbers often use a root-cutting auger, also known as a root snake, which has a rotating blade that cuts through roots inside the pipe. Another option is hydro jetting, which uses high-pressure water to blast away roots and debris.

While mechanical removal is highly effective, it doesn’t prevent roots from growing back. To keep your pipes clear, you’ll need to follow up with preventative measures.

Chemical Root Killers

Chemical treatments can dissolve tree roots inside pipes without harming surrounding trees or plants. There are two common types of root killers: foaming root killer and rock salt.

Foaming root killer works by expanding inside the pipe, coating the roots with a herbicide that breaks them down over time. This type of treatment also leaves behind a residue that helps prevent future growth.

Rock salt is a natural and inexpensive alternative. When poured into the sewer line and left for several hours, it dehydrates and kills the roots. However, it’s less effective than foaming root killer and may require repeated treatments.

Preventing Tree Roots from Entering Sewer Lines

Once you’ve removed the roots, the next step is to prevent them from coming back. Prevention is key to avoiding costly repairs in the future.

Identify High-Risk Areas

Check your property’s site plans to locate your sewer lines. If you have trees growing near them, especially if your home has older clay pipes, there’s a higher risk of root intrusion. Consider hiring a professional to inspect your pipes with a sewer camera to catch any early signs of root growth.

Use Root Killer as a Preventative Measure

Applying a root killer biannually can help prevent new root growth. Many experts recommend using foaming root killer or rock salt once in the spring and again in the fall. Regular use can create a protective barrier inside the pipe, making it less likely for roots to invade.

Replace Old or Damaged Pipes

If your home has aging clay or cast iron pipes, replacing them with modern PVC or ABS pipes can significantly reduce the risk of root intrusion. These newer materials are more resistant to cracks and leaks. While pipe replacement can be expensive, it’s a long-term investment that can prevent future plumbing disasters.

Schedule Regular Sewer Line Maintenance

Routine sewer line cleanings can help catch and remove roots before they cause serious problems. Many homeowners schedule a professional cleaning every one to two years, especially if they have trees growing near their pipes. A plumber can use specialized equipment to clear minor root intrusions before they lead to major clogs.

Consider Installing a Pipe Liner

For a long-term solution, consider installing a cured-in-place pipe liner. This method involves inserting an epoxy-coated liner into your existing sewer pipe. Once it cures, the liner creates a seamless, durable barrier that prevents roots from penetrating in the future. This is an excellent alternative to full pipe replacement and can extend the lifespan of your sewer system.

When to Call a Professional

If you’ve tried multiple solutions and still experience plumbing issues, it may be time to call in a professional. A plumber can perform a camera inspection to determine the extent of the problem and recommend the best course of action.

Professionals have access to industrial-grade root-cutting tools and hydro jetting equipment that can remove even the most stubborn blockages. If your pipes are severely damaged, they can also advise on repairs or replacement options.

Call 1-Tom-Plumber 

Don’t hesitate to contact us here or call us at 1-Tom-Plumber (1-866-758-6237) if you need any plumbing, drain cleaning, water damage, or excavation service. 1-Tom-Plumber’s certified team of plumbers and drain technicians respond immediately to any emergency plumbing, drain cleaning, or water damage problem. We also handle the excavation of underground water lines and sewer main lines. Our immediate-response team is available every day and night of the year, even on holidays.